It's a great weekend for cash-strapped turn-based strategy buffs as Steam is offering 66% off Civilization V and GamersGate has discounted various Total War titles by 50% or more. Impulse is serving up a diverse platter with 35% off Rift, 40% off Dead Space 2, 50% off Splinter Cell: Conviction, and Prince of Persia: The Forgotten Sands. Meanwhile, Microsoft has cut 50% off the newly released Section 8: Prejudice, and Direct2Drive's summer sale continues with 75% off Amnesia: The Dark Descent.

Steam
Altitude $4.99 (50% off, also free to play until Sunday)
Civilization V $17.00 (66% off)
Cogs $4.99 (50% off)
Pride of Nations $9.99 (50% off)

Impulse
Rift $24.99 (35% off)
Gray Matter $14.99 (50% off)
The Settlers 7: Paths to a Kingdom Deluxe $19.99 (50% off)
Dead Space 2 $17.99 (40% off)
Splinter Cell: Conviction $9.99 (50% off)
Prince of Persia: The Forgotten Sands Deluxe $9.99 (66% off)
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GamersGate
Empire: Total War $7.98 (60% off)
Medieval 2: Total War Gold Edition $3.98 (87% off)
Napoleon: Total War Imperial $7.98 (60% off)
Total War Shogun 2: The Ikko Ikki Clan $2.50 (50% off)
Crazy Taxi $4.48 (78% off)
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Direct2Drive
Amnesia: The Dark Descent $7.95 (75% off)
Cogs $3.95 (60% off)
Star Raiders $3.95 (60% off)
Doctor Who: The Adventure Games - Ep. 1-4 $5.15 (60% off)

Games for Windows
Section 8: Prejudice $7.49 (50% off)

Good Old Games
Uru: Complete Chronicles $3.99 (60% off)